CURRENTNATIONAL Sinovac booster dose can activate cellular immunity against Omicron variantEditor Selangor JournalJanuary 1, 2022 by Editor Selangor JournalJanuary 1, 2022 KUALA LUMPUR Jan 1 — Preliminary results of a study conducted by the Pontifical Catholic University in Chile (UC) showed that the Covid-19 Sinovac vaccine...